start_stream
if (bus_adap->ops->start_stream != NULL)
ret = bus_adap->ops->start_stream(dev);
.start_stream = as102_usb_start_stream,
int (*start_stream)(struct as102_dev_t *dev);
err = start_stream(bebob, &bebob->rx_stream);
err = start_stream(bebob, &bebob->tx_stream);
err = start_stream(efw, &efw->rx_stream, rate);
err = start_stream(efw, &efw->tx_stream, rate);
err = start_stream(oxfw, &oxfw->rx_stream);
err = start_stream(oxfw, &oxfw->tx_stream);